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Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid

The spectral boundary integral method is popular for simulating fault, fracture, and frictional processes at a planar interface. However, the method is less commonly used to simulate off-fault dynamic fields. Here we develop a spectral boundary integral method for poroelastodynamic solid. The method...

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Autores principales: Heimisson, Elías Rafn, Rinaldi, Antonio Pio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8989367/
https://www.ncbi.nlm.nih.gov/pubmed/35464715
http://dx.doi.org/10.1007/s40948-022-00368-4
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author Heimisson, Elías Rafn
Rinaldi, Antonio Pio
author_facet Heimisson, Elías Rafn
Rinaldi, Antonio Pio
author_sort Heimisson, Elías Rafn
collection PubMed
description The spectral boundary integral method is popular for simulating fault, fracture, and frictional processes at a planar interface. However, the method is less commonly used to simulate off-fault dynamic fields. Here we develop a spectral boundary integral method for poroelastodynamic solid. The method has two steps: first, a numerical approximation of a convolution kernel and second, an efficient temporal convolution of slip speed and the appropriate kernel. The first step is computationally expensive but easily parallelizable and scalable such that the computational time is mostly restricted by computational resources. The kernel is independent of the slip history such that the same kernel can be used to explore a wide range of slip scenarios. We apply the method by exploring the short-time dynamic and static responses: first, with a simple source at intermediate and far-field distances and second, with a complex near-field source. We check if similar results can be attained with dynamic elasticity and undrained pore-pressure response and conclude that such an approach works well in the near-field but not necessarily at an intermediate and far-field distance. We analyze the dynamic pore-pressure response and find that the P-wave arrival carries a significant pore pressure peak that may be observed in high sampling rate pore-pressure measurements. We conclude that a spectral boundary integral method may offer a viable alternative to other approaches where the bulk is discretized, providing a better understanding of the near-field dynamics of the bulk in response to finite fault ruptures.
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spelling pubmed-89893672022-04-22 Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid Heimisson, Elías Rafn Rinaldi, Antonio Pio Geomech Geophys Geo Energy Ge Resour Original Article The spectral boundary integral method is popular for simulating fault, fracture, and frictional processes at a planar interface. However, the method is less commonly used to simulate off-fault dynamic fields. Here we develop a spectral boundary integral method for poroelastodynamic solid. The method has two steps: first, a numerical approximation of a convolution kernel and second, an efficient temporal convolution of slip speed and the appropriate kernel. The first step is computationally expensive but easily parallelizable and scalable such that the computational time is mostly restricted by computational resources. The kernel is independent of the slip history such that the same kernel can be used to explore a wide range of slip scenarios. We apply the method by exploring the short-time dynamic and static responses: first, with a simple source at intermediate and far-field distances and second, with a complex near-field source. We check if similar results can be attained with dynamic elasticity and undrained pore-pressure response and conclude that such an approach works well in the near-field but not necessarily at an intermediate and far-field distance. We analyze the dynamic pore-pressure response and find that the P-wave arrival carries a significant pore pressure peak that may be observed in high sampling rate pore-pressure measurements. We conclude that a spectral boundary integral method may offer a viable alternative to other approaches where the bulk is discretized, providing a better understanding of the near-field dynamics of the bulk in response to finite fault ruptures. Springer International Publishing 2022-03-25 2022 /pmc/articles/PMC8989367/ /pubmed/35464715 http://dx.doi.org/10.1007/s40948-022-00368-4 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Original Article
Heimisson, Elías Rafn
Rinaldi, Antonio Pio
Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title_full Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title_fullStr Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title_full_unstemmed Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title_short Spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
title_sort spectral boundary integral method for simulating static and dynamic fields from a fault rupture in a poroelastodynamic solid
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8989367/
https://www.ncbi.nlm.nih.gov/pubmed/35464715
http://dx.doi.org/10.1007/s40948-022-00368-4
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